Date: Tue, 20 Dec 2016 19:41:33 -0600 From: Brandon J. Wandersee <brandon.wandersee@gmail.com> To: Malcolm Matalka <mmatalka@gmail.com> Cc: Aleksandr Miroslav <alexmiroslav@gmail.com>, freebsd-questions@freebsd.org Subject: Re: zfs (zxfer) replication -- "holes" in backups? Message-ID: <86bmw6m52q.fsf@WorkBox.homestead.org> In-Reply-To: <867f6u22vv.fsf@gmail.com> References: <CACcSE1znx_3H=71hT_3TOu-tMhWjkm7_sx-nxLQA83iz4aeR6w@mail.gmail.com> <CACcSE1xG%2B6wLoGwjNDAcadcdCxFD6sAC2G%2BXkNn911myfosgKw@mail.gmail.com> <867f6u22vv.fsf@gmail.com>
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Malcolm Matalka writes: > Aleksandr Miroslav <alexmiroslav@gmail.com> writes: >> It turns out that when I sent my snapshots to my backup machine, I never >> turned off this property, the backup machine also had zfstools installed, >> and so was taking snapshots of my backupsnaphots. Hence the holes. I've >> since cleaned this up, and will let backups run for a few days and see if >> this fixes the problem. > > I ran into this problem where the snapshots the machine that was backing > up to named the snapshots the same thing so zxfer thought the transfer > didn't need to happen. I "solved" this by putting the hostname in the > snapshot name. There is probably a better way though. I'm not sure there's an entirely elegant way to deal with it. I use zfstools and zxfer myself, and have just accepted having a really long line in the crontab to remove the properties before transfer. I used to use sysutils/zfsnap, which is a pretty good tool in its own right and can avoid the problem of the system holding backups creating new snapshots on the backups. However, it does that by requiring multi-entries for each type of backup iteration, as well as lines for every single dataset, added to /etc/periodic.conf. Works well enough for simple setups, but more complex ones get out of hand. -- :: Brandon J. Wandersee :: brandon.wandersee@gmail.com :: -------------------------------------------------- :: 'The best design is as little design as possible.' :: --- Dieter Rams ----------------------------------
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